Adjustable traction lug



June 10 1,497,092 P. A. DELIEUVIN ADJUSTABLE TRACTION LUG Filed Dec. 29, 1922 Patented June 10, 1924.

UNlTED STATS 4 1,497,092 PATENT OFFICIEH PAUL ALBERT MAURICE DELIEUVIN, OF PARIS, FRANCE.

ADJUSTABLE TRACTION LUG.

' Application filed' December 29, 1922. Serial No. 609,729.

" wide rims upon which are bolted angle pieces to catch in the ground; but when the ground is wet, the earth which is held by the rim I will accumulate between the angle pieces and finally the pieces will cease to hold in the ground, and the wheels now slip so'that the tractor must cease working until the ground has become solid at the surface.

Another serious drawback in these wheels with wide rims provided with bolted angle pieces is that these pieces cannot be readily removed, so that the drivers neglect to remove them when going upon the roads (often paved roads) and thus they damage not only the roads, but especially the apparatus by reason of the shocks occasioned each time the angle piece comes upon the hard ground. The wheel with disappearing pallets, which is the object of the present invention, obviates all these drawbacks.

According to the invention, the wheel rim which is preferably formed by a flat ring is provided with notches at its periphery and carries cross shafts having pallets or gripping members pivoted thereon, said pallets being formed of two cheeks connected to each other by a transverse stud adapted to rest in one of the notches of the wheel rim when the pallet occupies its protruding position and to rest in another notch when the pallet occupies its retracted position.

Other characteristic features of the invention will appear from the following description.

It will be understood that owing to the absence of the usual rim, there is no more accumulation of earth upon the wheel, the pallets being separated from each other by a sufficient space so that the earth readily falls off. The adhesion of the wheel upon the ground remains always the same, since each gripping element becomes clean in an automatic manner. Lastly, as will be hereinafter described, the handling of the pallets in order to obtain the road position or the working position is done by hand without the use of wrenches or tools, and this is done very rapidly.

In the accompanying drawing which,

shows byway of example an embodiment] of the invention:

F 1g. 1 is a front view of the improved wheel, some of the pallets being inthe work:

ing position, as shown at I), while others are in the road position, as shown at 0, and some in the intermediate posit-ion.

Fig. 2 is a vertical section of the whee on the line A-AA of Fig. 1.

Fig. 3 is a perspective. view of a part of the disc serving as a rim with a pallet which has not altogether reached the working po-,

sition (the returning spring is not.shown).

In the mode of construction shown'in the drawings, the wheel is formed of two, frusto-con1cal pressed sheet metal plates 1 and 2 assembled at the centre with the hub, and at the periphery with a flat ring or disc of steel 3. The wheel is'thus simple and very strong; the smooth side of the plates will not allow the earth to adhere to,

the same nor to remain. The flatfring 3 is provided at. its peri hery' with notches 4 and it is also prov-i ed; at equal distances from said notches with v wh 6 nd? comprises two cheeks 8 integral with each other and preferably made of cast steel, which are pivoted on the shafts 7 and connected together by a transverse stud 5 cast integral with the cheeks. In the working position shown in Fig. 2 and at b in Fig. l, the two noses 8 of each pallet form projections adapted to enter the ground, and each stud 5 rests in one of the notches 4.. In order to bring the pallets to the road position, they are rotated by the hand about the shafts 7 and raised outwardly and then allowed to drop back towards the center of the wheel. In the new position, the stud 5 of each pallet will enter a notch 4 adjacent the notch in which it was previously en gaged. In this road position shown at 0 in Fig. 1, the back or tread-part 8 of each pallet will supplement the periphery of the disc 3 in order to form a smooth rim, permitting travel on the road or upon already tilled ground.

The pallets are held in either position by a single reaction spring of circular shape 9 acting upon each of the pallets by means of solely byway of example.

a simple hook 1O pivoted to a stud or pin 12 of each pallet, and secured to said stud or pin for instance by means of a split-pin traversing the latter.

It will be readily observed that the operation of the device is most simple. The tractor, When arriving at the fields, has its pallets in the road position. In order to bring them to the working position, it is simply necessary to use the hand, without any tool and to take them one after the other and to swing each of them, so that the stud 5 Wlll enter the notch 4 which is set free by the stud 5 of the preceding pallet. It is obvious that the first pallet lifted can only take the proper position when all the other pallets shall have taken their position, and only at that time will the notch 4: receiving the bearing stud 5 of this first pallet become free. It is noticed that an effort need be exerted against the action of the spring 9, as far as *the middle of the pallet stroke only, for

pallet may have any desired length or width.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a wheel for tractors, a wheel body having equidistant notches in its periphery, transverse pivots mounted on said wheel body at equal distances from the notches and gripping lugs formed of two cheeks connected together by a bearing stud, said gripping lugs being pivoted on said pivots and the bearing studs thereof being adapted to rest in either of two adjacent notches, each gripping lug being adapted to project from the periphery of the wheel body when its bearing stud rests in one of the notches.

2. In a wheel for tractors, a wheel body having equidistant notches in its periphery, transverse pivots mounted on said wheel body at equal distances from the'notches, gripping lugs formed of two cheeks connected together by a bearing stud, said gripping lugs being pivoted on said pivots and the bearing studs thereof being adapted to rest in either of two adjacent notches, each gripping lug being adapted to project from the periphery of the wheel body when its bearing stud rests in one of the notches and hav ing tread portions adapted to complete the tread surface of the wheel body when the bearing stud rests in the other notch, a circular spring and connecting lugs pivoted on the gripping members and attached to said circular spring.

In testimony whereof I have signed my name to this specification. I

PAUL AUEERT MAURICE DELlEUl/llll. 

